YOOLOX 10k Powerbank
High quality look with soft touch
At 10 x 150 x 75 mm, the YOOLOX 17k is roughly the size of a smartphone. However, with a weight of 270g, the power bank is also a bit heavier. The housing is made of plastic and has a soft-touch coating. The matt surface gives the power bank a high-quality look and improves the feel.
Construction of the power bank
The upper side, which is embedded in the rest of the housing, is provided in the middle with 7 suction cups arranged in a circle. Slippery smartphones are guaranteed to stick to the Qi charging surface. The YOOLOX lettering is on the underside. The power bank can be switched on via a push button on the side.
A total of 6 LEDs indicate the status of the power bank. Four of the LEDs provide information about the remaining capacity of the power bank, two further LEDs provide information about the activity of the Qi charging function. In addition to Qi charging, the power bank can charge in the traditional way using a cable. There is a USB type A output, a USB-C input and output and a micro USB input.
The processing quality is unproblematic. In addition to the power bank, the scope of delivery includes a multilingual user manual and a micro-USB cable. Due to the comparatively high price, it would have been desirable if YOOLOX had included a suitable USB-C cable.
Measurement results
YOOLOX indicates the capacity of the 10k power bank with 10.000 milliampere hours (mAh). Anyone who thinks they can charge a smartphone with a 2500 mAh battery 4x is wrong. The capacity of the power bank is based on a voltage of 3.7 volts (V). This is usually the nominal voltage of a lithium-ion battery, as it usually occurs in power banks.
Smartphones are in turn charged via USB, the voltage of which is 5V. More precise is the specification of watt hours (Wh) that many manufacturers provide. In the case of the YOOLOX 10k, 37 Wh are specified. If you divide 37 Wh by 3.7V, you get 10 Ah or 10.000 mAh at 3.7V. If you divide 37 Wh by 5V, you only have 7.4 Ah or 7.400 mAh left. A smartphone with 2500 mAh could not even be fully charged 3 times.
What does the YOOLOX 10k really do?
I measured the capacity of the battery with the EBD-USB meter. For the test, the power bank is initially fully charged. Then the power bank is discharged again with the aid of a resistor, until the deep discharge protection intervenes and the power bank switches off automatically. The calculated power in watt-hours is then converted into milliamp hours at 3.7V.
The test resulted in an output of 34.91 Wh. This corresponds to a capacity of 9451 mAh at 3.7V, which in turn corresponds to 95% with the manufacturer's information.
How fast does the YOOLOX 10k load?
The power bank supports Qi charging and is equipped with a total of three USB sockets. Here are the technical data:
- Micro-USB input
- Quick Charge 2.0
- 5V / 2A or 9V / 1.8A
- USB-C input / output
- Quick Charge 3.0
- Power Delivery 3.0
- 5V / 2A or 9V / 2A or 12V / 1.5A (output)
- USB-A output
- Quick Charge 3.0
- 5V / 2.4A or 12V / 1.5A
- Qi output
- 5V / 1A
The YOOLOX 10k starts charging as soon as the smartphone is connected by cable. The power bank needs exactly one minute to switch to Quick Charge mode. Qi charging can only be activated at the push of a button. The LED indicator provides information about the active Qi charging function.
A Xiaomi Mi Mix 2S used. The smartphone is equipped with a 3400 mAh battery. To charge the battery by 10% (Qi), the YOOLOX 10k requires a total of 16 minutes. Ideally, this would correspond to a charging current of 1.28A, which in turn corresponds to the manufacturer's specification.
Both the USB-A and the USB-C port exceed the manufacturer's specifications. Up to 3.2A are possible on 5V. Up to 2.3A at 9V and up to 1.6A at 12V. The Xiaomi Mi Mix 2S was fully charged with 6.46A within 2.66 minutes at maximum 100V.
How long does it take to charge the YOOLOX 10k?
The power bank can be charged from any USB power source via the micro USB or USB-C. A quick charger is recommended to charge the YOOLOX 10k as quickly as possible. A Quick Charge 3.0 charger takes 3 hours and 47 minutes to fully charge the power bank. An ordinary 5V 2A charger takes 5 hours.
